An order initiating a contempt proceeding directed at a person other than a party shall be served by a United States marshal, a deputy United States marshal, or a person specially appointed for that purpose, who shall deliver a copy of the order to the person named therein. Proof of such service shall be as provided in RCFC 45(b)(3). All other orders relating to contempt proceedings shall be served in the manner prescribed in RCFC 4 (if against an agent or attorney of the United States) or in RCFC 5 (if against a plaintiff, a plaintiff’s representative, or a non-party).